Аннотация:The new methods to extract the information on vertical turbulence profile from the spatial structure of single-star scintillations are reviewed. The first method involves quasi-simultaneous measurements of scintillation indices with several apertures of different size. The second method consists in measuring the differential scintillation index in a pair of small concentric apertures. Both methods were used at Maidanak observatory in 1998-99. The median contribution of free atmosphere to the total turbulence integral at Maidanak is estimated to be 0.38.
Based on this experience we plan to build the Multi Aperture Scintillation Sensor (MASS) - a turbulence profiler with 4 concentric apertures.